org.elasticsearch.search.aggregations.metrics.ParsedGeoBounds Maven / Gradle / Ivy

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/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.elasticsearch.search.aggregations.metrics;

import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.collect.Tuple;
import org.elasticsearch.common.geo.GeoBoundingBox;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.xcontent.ConstructingObjectParser;
import org.elasticsearch.common.xcontent.ObjectParser;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.search.aggregations.ParsedAggregation;

import java.io.IOException;

import static org.elasticsearch.common.geo.GeoBoundingBox.BOTTOM_RIGHT_FIELD;
import static org.elasticsearch.common.geo.GeoBoundingBox.BOUNDS_FIELD;
import static org.elasticsearch.common.geo.GeoBoundingBox.LAT_FIELD;
import static org.elasticsearch.common.geo.GeoBoundingBox.LON_FIELD;
import static org.elasticsearch.common.geo.GeoBoundingBox.TOP_LEFT_FIELD;
import static org.elasticsearch.common.xcontent.ConstructingObjectParser.constructorArg;

public class ParsedGeoBounds extends ParsedAggregation implements GeoBounds {

    // A top of Double.NEGATIVE_INFINITY yields an empty xContent, so the bounding box is null
    @Nullable
    private GeoBoundingBox geoBoundingBox;

    @Override
    public String getType() {
        return GeoBoundsAggregationBuilder.NAME;
    }

    @Override
    public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
        if (geoBoundingBox != null) {
            geoBoundingBox.toXContent(builder, params);
        }
        return builder;
    }

    @Override
    @Nullable
    public GeoPoint topLeft() {
        return geoBoundingBox != null ? geoBoundingBox.topLeft() : null;
    }

    @Override
    @Nullable
    public GeoPoint bottomRight() {
        return geoBoundingBox != null ? geoBoundingBox.bottomRight() : null;
    }

    private static final ObjectParser PARSER = new ObjectParser<>(ParsedGeoBounds.class.getSimpleName(), true,
            ParsedGeoBounds::new);

    private static final ConstructingObjectParser, Void> BOUNDS_PARSER =
            new ConstructingObjectParser<>(ParsedGeoBounds.class.getSimpleName() + "_BOUNDS", true,
                    args -> new Tuple<>((GeoPoint) args[0], (GeoPoint) args[1]));

    private static final ObjectParser GEO_POINT_PARSER = new ObjectParser<>(
            ParsedGeoBounds.class.getSimpleName() + "_POINT", true, GeoPoint::new);

    static {
        declareAggregationFields(PARSER);
        PARSER.declareObject((agg, bbox) -> {
            agg.geoBoundingBox = new GeoBoundingBox(bbox.v1(), bbox.v2());
        }, BOUNDS_PARSER, BOUNDS_FIELD);

        BOUNDS_PARSER.declareObject(constructorArg(), GEO_POINT_PARSER, TOP_LEFT_FIELD);
        BOUNDS_PARSER.declareObject(constructorArg(), GEO_POINT_PARSER, BOTTOM_RIGHT_FIELD);

        GEO_POINT_PARSER.declareDouble(GeoPoint::resetLat, LAT_FIELD);
        GEO_POINT_PARSER.declareDouble(GeoPoint::resetLon, LON_FIELD);
    }

    public static ParsedGeoBounds fromXContent(XContentParser parser, final String name) {
        ParsedGeoBounds geoBounds = PARSER.apply(parser, null);
        geoBounds.setName(name);
        return geoBounds;
    }

}